/ARDWARE PROBS
FILE INFORMATION
FILENAME(S): /ARDWARE PROBS
FILE TYPE(S): SEQ
FILE SIZE: 5K
FIRST SEEN: 2025-11-30 16:59:23
APPEARS ON: 1 disk(s)
FILE HASH
91109a0d555fb81e9dda3d5344610063bded9927335b3377699adbd3c3ee50fe
FOUND ON DISKS (1 DISKS)
| DISK TITLE | FILENAME | FILE TYPE | COLLECTION | TRACK | SECTOR | ACTIONS |
|---|---|---|---|---|---|---|
| SERVANT V484 4 4 | /ARDWARE PROBS | SEQ | High Voltage Complete C64 Collection | 21 | 0 | DOWNLOAD FILE |
FILE CONTENT & ANALYSIS
00000000: C1 50 50 45 4E 44 49 58 20 C4 3A 20 20 C8 C1 D2 |.PPENDIX .: ...| 00000010: C4 D7 C1 D2 C5 20 D0 D2 CF C2 CC C5 CD D3 0D 0D |..... ..........| 00000020: C3 4F 4D 4D 4F 44 4F 52 45 20 43 4F 4D 50 55 54 |.OMMODORE COMPUT| 00000030: 45 52 20 53 59 53 54 45 4D 53 20 48 41 56 45 20 |ER SYSTEMS HAVE | 00000040: 41 4C 57 41 59 53 20 48 41 44 20 42 55 47 53 20 |ALWAYS HAD BUGS | 00000050: 41 4E 44 20 51 55 49 52 4B 53 20 4F 46 20 56 41 |AND QUIRKS OF VA| 00000060: 52 59 49 4E 47 20 53 45 56 45 52 49 54 59 2E 20 |RYING SEVERITY. | 00000070: 20 D3 4F 4D 45 20 4F 46 20 54 48 45 20 51 55 49 | .OME OF THE QUI| 00000080: 52 4B 53 20 4D 41 59 20 41 46 46 45 43 54 20 54 |RKS MAY AFFECT T| 00000090: 48 45 20 4F 50 45 52 41 54 49 4F 4E 20 57 48 45 |HE OPERATION WHE| 000000A0: 4E 20 D4 C8 C5 20 D3 C5 D2 D6 C1 CE D4 20 49 53 |N ... ....... IS| 000000B0: 20 49 4E 20 43 48 41 52 47 45 20 4F 46 20 4F 50 | IN CHARGE OF OP| 000000C0: 45 52 41 54 49 4F 4E 53 2E 20 20 D3 45 56 45 52 |ERATIONS. .EVER| 000000D0: 41 4C 20 4B 4E 4F 57 4E 20 42 55 47 53 20 48 41 |AL KNOWN BUGS HA| 000000E0: 53 20 42 45 45 4E 20 43 49 52 43 55 4D 56 45 4E |S BEEN CIRCUMVEN| 000000F0: 54 45 44 20 49 4E 20 54 48 45 20 44 45 53 49 47 |TED IN THE DESIG| 00000100: 4E 20 4F 46 20 D4 C8 C5 20 D3 C5 D2 D6 C1 CE D4 |N OF ... .......| 00000110: 2C 20 42 55 54 20 54 48 45 4E 20 54 48 45 52 45 |, BUT THEN THERE| 00000120: 20 41 52 45 20 53 4F 4D 45 20 54 48 41 54 20 43 | ARE SOME THAT C| 00000130: 41 4E 27 54 20 42 45 20 50 41 54 43 48 45 44 20 |AN'T BE PATCHED | 00000140: 4F 56 45 52 2E 20 20 C2 45 4C 4F 57 20 59 4F 55 |OVER. .ELOW YOU| 00000150: 27 4C 4C 20 46 49 4E 44 20 41 20 4C 49 53 54 20 |'LL FIND A LIST | 00000160: 4F 46 20 54 48 45 20 42 55 47 53 20 41 4E 44 20 |OF THE BUGS AND | 00000170: 51 55 49 52 4B 53 20 4B 4E 4F 57 4E 20 42 59 20 |QUIRKS KNOWN BY | 00000180: 54 48 45 20 41 55 54 48 4F 52 20 54 48 41 54 20 |THE AUTHOR THAT | 00000190: 59 4F 55 20 4D 41 59 20 45 4E 43 4F 55 4E 54 45 |YOU MAY ENCOUNTE| 000001A0: 52 2E 0D 0D C1 CC CC 20 C4 C9 D3 CB 20 C4 D2 C9 |R...... .... ...| 000001B0: D6 C5 D3 3A 0D D7 48 45 4E 20 59 4F 55 20 41 54 |...:..HEN YOU AT| 000001C0: 54 45 4D 50 54 20 54 4F 20 45 58 43 45 45 44 20 |TEMPT TO EXCEED | 000001D0: 54 48 45 20 4E 55 4D 42 45 52 20 4F 46 20 46 49 |THE NUMBER OF FI| 000001E0: 4C 45 53 20 50 45 52 4D 49 54 54 45 44 2C 20 4F |LES PERMITTED, O| 000001F0: 44 44 20 54 48 49 4E 47 53 20 53 4F 4D 45 54 49 |DD THINGS SOMETI| 00000200: 4D 45 53 20 48 41 50 50 45 4E 53 2E 20 20 D4 48 |MES HAPPENS. .H| 00000210: 45 20 50 52 4F 42 4C 45 4D 20 49 53 20 57 4F 52 |E PROBLEM IS WOR| 00000220: 53 54 20 4F 4E 20 54 48 45 20 31 35 37 31 20 28 |ST ON THE 1571 (| 00000230: 41 4E 44 20 50 4F 53 53 49 42 4C 59 20 54 48 45 |AND POSSIBLY THE| 00000240: 20 31 35 34 31 29 2E 20 20 D3 50 41 43 45 20 49 | 1541). .PACE I| 00000250: 53 20 41 4C 4C 4F 43 41 54 45 44 20 46 4F 52 20 |S ALLOCATED FOR | 00000260: 54 48 45 20 4E 45 57 20 46 49 4C 45 20 57 48 49 |THE NEW FILE WHI| 00000270: 4C 45 20 54 48 45 52 45 20 49 53 20 4E 4F 20 52 |LE THERE IS NO R| 00000280: 4F 4F 4D 20 46 4F 52 20 54 48 45 20 46 49 4C 45 |OOM FOR THE FILE| 00000290: 20 4E 41 4D 45 20 49 4E 20 54 48 45 20 44 49 52 | NAME IN THE DIR| 000002A0: 45 43 54 4F 52 59 2E 20 20 D4 48 45 20 42 55 47 |ECTORY. .HE BUG| 000002B0: 20 57 49 4C 4C 20 45 53 50 45 43 49 41 4C 4C 59 | WILL ESPECIALLY| 000002C0: 20 41 46 46 45 43 54 20 54 48 45 20 46 49 4C 45 | AFFECT THE FILE| 000002D0: 20 43 4F 50 49 45 52 2E 20 20 C9 46 20 59 4F 55 | COPIER. .F YOU| 000002E0: 20 53 45 45 20 54 48 45 20 45 52 52 4F 52 20 4D | SEE THE ERROR M| 000002F0: 45 53 53 41 47 45 20 22 44 49 53 4B 20 46 55 4C |ESSAGE "DISK FUL| 00000300: 4C 22 2C 20 59 4F 55 20 53 48 4F 55 4C 44 20 56 |L", YOU SHOULD V| 00000310: 41 4C 49 44 41 54 45 20 54 48 45 20 44 49 53 4B |ALIDATE THE DISK| 00000320: 20 54 4F 20 50 55 54 20 54 48 49 4E 47 53 20 52 | TO PUT THINGS R| 00000330: 49 47 48 54 20 41 47 41 49 4E 2E 20 20 C9 54 20 |IGHT AGAIN. .T | 00000340: 53 48 4F 55 4C 44 20 42 45 20 4E 4F 54 45 44 20 |SHOULD BE NOTED | 00000350: 54 48 41 54 20 59 4F 55 20 57 4F 4E 27 54 20 45 |THAT YOU WON'T E| 00000360: 4E 43 4F 55 4E 54 45 52 20 54 48 45 20 44 49 53 |NCOUNTER THE DIS| 00000370: 4B 20 46 55 4C 4C 20 45 52 52 4F 52 20 49 46 20 |K FULL ERROR IF | 00000380: 54 48 45 20 46 49 4C 45 20 43 4F 50 49 45 52 20 |THE FILE COPIER | 00000390: 52 55 4E 53 20 4F 55 54 20 4F 46 20 44 49 53 4B |RUNS OUT OF DISK| 000003A0: 20 53 50 41 43 45 20 28 4E 4F 54 20 45 58 43 45 | SPACE (NOT EXCE| 000003B0: 45 44 49 4E 47 20 54 48 45 20 4D 41 58 49 4D 55 |EDING THE MAXIMU| 000003C0: 4D 20 4E 55 4D 42 45 52 20 4F 46 20 46 49 4C 45 |M NUMBER OF FILE| 000003D0: 53 29 2E 20 20 C1 20 53 41 46 45 47 55 41 52 44 |S). . SAFEGUARD| 000003E0: 20 53 59 53 54 45 4D 20 50 52 45 56 45 4E 54 53 | SYSTEM PREVENTS| 000003F0: 20 54 48 41 54 2E 20 20 D3 4F 20 46 41 52 2C 20 | THAT. .O FAR, | 00000400: C9 20 48 41 56 45 20 4E 4F 54 20 46 4F 55 4E 44 |. HAVE NOT FOUND| 00000410: 20 41 20 57 41 59 20 54 4F 20 43 49 52 43 55 4D | A WAY TO CIRCUM| 00000420: 56 45 4E 54 20 54 48 45 20 50 52 4F 42 4C 45 4D |VENT THE PROBLEM| 00000430: 53 20 54 48 41 54 20 4F 43 43 55 52 20 57 48 45 |S THAT OCCUR WHE| 00000440: 4E 20 59 4F 55 20 54 52 59 20 54 4F 20 53 41 56 |N YOU TRY TO SAV| 00000450: 45 20 54 4F 4F 20 4D 41 4E 59 20 46 49 4C 45 53 |E TOO MANY FILES| 00000460: 2E 20 20 D3 4F 20 46 4F 52 20 54 48 45 20 54 49 |. .O FOR THE TI| 00000470: 4D 45 20 42 45 49 4E 47 2C 20 56 41 4C 49 44 41 |ME BEING, VALIDA| 00000480: 54 45 20 54 48 45 20 44 49 53 4B 20 41 46 54 45 |TE THE DISK AFTE| 00000490: 52 20 41 20 44 49 53 4B 20 46 55 4C 4C 20 45 52 |R A DISK FULL ER| 000004A0: 52 4F 52 2E 0D 0D 31 35 37 31 20 C4 C9 D3 CB 20 |ROR...1571 .... | 000004B0: C4 D2 C9 D6 C5 3A 0D D4 48 45 20 42 55 47 53 20 |.....:..HE BUGS | 000004C0: 41 50 50 4C 59 20 54 4F 20 54 48 45 20 31 32 38 |APPLY TO THE 128| 000004D0: C4 20 50 4F 52 54 41 42 4C 45 20 28 31 32 38 C4 |. PORTABLE (128.| 000004E0: 20 57 49 54 48 20 43 4F 4F 4C 49 4E 47 20 46 41 | WITH COOLING FA| 000004F0: 4E 20 26 20 43 41 52 52 59 49 4E 47 20 48 41 4E |N & CARRYING HAN| 00000500: 44 4C 45 29 2C 20 41 4E 44 20 54 48 45 20 53 54 |DLE), AND THE ST| 00000510: 41 4E 44 2D 41 4C 4F 4E 45 20 31 35 37 31 2E 20 |AND-ALONE 1571. | 00000520: 20 C8 4F 57 45 56 45 52 2C 20 55 50 47 52 41 44 | .OWEVER, UPGRAD| 00000530: 45 20 D2 CF CD 27 53 20 48 41 53 20 42 45 45 4E |E ...'S HAS BEEN| 00000540: 20 52 45 4C 45 41 53 45 44 20 42 59 20 C3 4F 4D | RELEASED BY .OM| 00000550: 4D 4F 44 4F 52 45 20 54 4F 20 46 49 58 20 41 4C |MODORE TO FIX AL| 00000560: 4C 20 50 52 4F 42 4C 45 4D 53 2E 20 20 D4 48 45 |L PROBLEMS. .HE| 00000570: 20 C3 4F 4D 4D 4F 44 4F 52 45 20 50 41 52 54 20 | .OMMODORE PART | 00000580: 4E 55 4D 42 45 52 20 4F 46 20 54 48 49 53 20 D2 |NUMBER OF THIS .| 00000590: CF CD 20 49 53 20 33 31 30 36 35 34 2D 30 35 2E |.. IS 310654-05.| 000005A0: 20 20 D9 4F 55 20 43 41 4E 20 47 45 54 20 59 4F | .OU CAN GET YO| 000005B0: 55 52 53 45 4C 46 20 54 48 45 20 46 49 58 20 D2 |URSELF THE FIX .| 000005C0: CF CD 20 42 59 20 53 45 4E 44 49 4E 47 20 41 4E |.. BY SENDING AN| 000005D0: 20 32 37 32 35 36 20 C5 D0 D2 CF CD 20 41 4C 4F | 27256 ..... ALO| 000005E0: 4E 47 20 57 49 54 48 20 54 48 45 20 53 41 4D 45 |NG WITH THE SAME| 000005F0: 20 54 55 52 4E 41 52 4F 55 4E 44 20 46 45 45 20 | TURNAROUND FEE | 00000600: 41 4E 44 20 53 48 49 50 50 49 4E 47 20 43 48 41 |AND SHIPPING CHA| 00000610: 52 47 45 20 54 48 41 54 20 41 50 50 4C 49 45 53 |RGE THAT APPLIES| 00000620: 20 46 4F 52 20 D3 C5 D2 D6 C1 CE D4 20 C5 D0 D2 | FOR ....... ...| 00000630: CF CD 53 2E 20 20 C1 4E 20 45 56 45 4E 20 42 45 |..S. .N EVEN BE| 00000640: 54 54 45 52 20 41 4C 54 45 52 4E 41 54 49 56 45 |TTER ALTERNATIVE| 00000650: 20 49 53 20 CA 49 46 46 59 C4 4F 53 2C 20 57 48 | IS .IFFY.OS, WH| 00000660: 49 43 48 20 46 55 52 54 48 45 52 20 45 4E 48 41 |ICH FURTHER ENHA| 00000670: 4E 43 45 53 20 54 48 45 20 50 45 52 46 4F 52 4D |NCES THE PERFORM| 00000680: 41 4E 43 45 20 4F 46 20 59 4F 55 52 20 53 59 53 |ANCE OF YOUR SYS| 00000690: 54 45 4D 20 28 D0 4C 45 41 53 45 20 52 45 46 45 |TEM (.LEASE REFE| 000006A0: 52 20 54 4F 20 41 50 50 45 4E 44 49 58 20 C6 29 |R TO APPENDIX .)| 000006B0: 2E 0D 0D D0 52 4F 42 4C 45 4D 53 20 54 48 41 54 |....ROBLEMS THAT| 000006C0: 20 4D 41 59 20 4F 43 43 55 52 20 55 53 49 4E 47 | MAY OCCUR USING| 000006D0: 20 22 4F 4C 44 2D D2 CF CD 22 20 31 35 37 31 27 | "OLD-..." 1571'| 000006E0: 53 20 57 49 54 48 20 D4 C8 C5 20 D3 C5 D2 D6 C1 |S WITH ... .....| 000006F0: CE D4 3A 0D 31 29 20 20 D2 41 4E 44 4F 4D 20 22 |..:.1) .ANDOM "| 00000700: 44 45 56 49 43 45 20 4E 4F 54 20 50 52 45 53 45 |DEVICE NOT PRESE| 00000710: 4E 54 22 20 45 52 52 4F 52 53 2E 20 20 D4 C8 C5 |NT" ERRORS. ...| 00000720: 20 D3 C5 D2 D6 C1 CE D4 20 4D 41 59 20 47 49 56 | ....... MAY GIV| 00000730: 45 20 55 50 20 41 4E 44 20 4D 41 4B 45 20 41 20 |E UP AND MAKE A | 00000740: 42 45 4C 4C 20 54 4F 4E 45 20 4F 4E 20 54 48 45 |BELL TONE ON THE| 00000750: 20 CD 41 49 4E 20 CD 45 4E 55 20 4F 52 20 41 42 | .AIN .ENU OR AB| 00000760: 4F 52 54 49 4E 47 20 42 59 20 44 49 53 50 4C 41 |ORTING BY DISPLA| 00000770: 59 49 4E 47 20 22 C9 2F CF 20 45 52 52 4F 52 22 |YING "./. ERROR"| 00000780: 20 49 4E 20 54 48 45 20 C4 49 53 4B 20 D4 4F 4F | IN THE .ISK .OO| 00000790: 4C 53 20 53 45 43 54 49 4F 4E 2E 0D 32 29 20 20 |LS SECTION..2) | 000007A0: D3 45 51 55 45 4E 54 49 41 4C 20 46 49 4C 45 20 |.EQUENTIAL FILE | 000007B0: 43 4F 52 52 55 50 54 49 4F 4E 2E 20 20 D7 48 45 |CORRUPTION. .HE| 000007C0: 4E 20 41 20 53 45 51 55 45 4E 54 49 41 4C 20 46 |N A SEQUENTIAL F| 000007D0: 49 4C 45 20 55 53 45 20 42 4C 4F 43 4B 53 20 4F |ILE USE BLOCKS O| 000007E0: 4E 20 42 4F 54 48 20 53 49 44 45 53 20 4F 46 20 |N BOTH SIDES OF | 000007F0: 54 48 45 20 44 49 53 4B 2C 20 49 54 20 57 49 4C |THE DISK, IT WIL| 00000800: 4C 20 53 4F 4D 45 54 49 4D 45 53 20 47 45 54 20 |L SOMETIMES GET | 00000810: 43 4F 52 52 55 50 54 45 44 2E 20 20 C1 46 46 45 |CORRUPTED. .FFE| 00000820: 43 54 53 20 54 48 45 20 C6 49 4C 45 20 C3 4F 50 |CTS THE .ILE .OP| 00000830: 49 45 52 2E 0D 33 29 20 20 D4 48 45 20 44 52 49 |IER..3) .HE DRI| 00000840: 56 45 20 43 41 4E 27 54 20 42 55 52 53 54 20 4C |VE CAN'T BURST L| 00000850: 4F 41 44 20 22 4C 4F 43 4B 45 44 22 20 46 49 4C |OAD "LOCKED" FIL| 00000860: 45 53 2E 20 20 C1 46 46 45 43 54 53 20 53 45 56 |ES. .FFECTS SEV| 00000870: 45 52 41 4C 20 D3 C5 D2 D6 C1 CE D4 20 46 45 41 |ERAL ....... FEA| 00000880: 54 55 52 45 53 2E 20 20 0D 34 29 20 20 D3 45 56 |TURES. .4) .EV| 00000890: 45 52 41 4C 20 42 55 47 53 20 41 46 46 45 43 54 |ERAL BUGS AFFECT| 000008A0: 53 20 54 48 45 20 53 50 45 45 44 20 4F 46 20 4F |S THE SPEED OF O| 000008B0: 50 45 52 41 54 49 4F 4E 53 2E 20 20 D4 48 45 20 |PERATIONS. .HE | 000008C0: 44 49 53 4B 20 44 52 49 56 45 20 47 4F 45 53 20 |DISK DRIVE GOES | 000008D0: 43 4C 49 43 4B 2D 43 4C 49 43 4B 2D 43 4C 49 43 |CLICK-CLICK-CLIC| 000008E0: 4B 20 46 4F 52 20 41 20 56 45 52 59 20 4C 4F 4E |K FOR A VERY LON| 000008F0: 47 20 54 49 4D 45 20 54 52 59 49 4E 47 20 54 4F |G TIME TRYING TO| 00000900: 20 52 45 43 4F 47 4E 49 5A 45 20 53 4F 4D 45 20 | RECOGNIZE SOME | 00000910: 44 49 53 4B 53 2C 20 41 4E 44 20 54 48 45 20 44 |DISKS, AND THE D| 00000920: 52 49 56 45 20 49 53 20 56 45 52 59 20 53 4C 4F |RIVE IS VERY SLO| 00000930: 57 20 41 54 20 57 52 49 54 49 4E 47 20 44 41 54 |W AT WRITING DAT| 00000940: 41 20 54 4F 20 54 48 45 20 42 41 43 4B 20 53 49 |A TO THE BACK SI| 00000950: 44 45 20 4F 46 20 54 48 45 20 44 49 53 4B 2E 0D |DE OF THE DISK..| 00000960: 0D C1 20 50 55 42 4C 49 43 20 44 4F 4D 41 49 4E |.. PUBLIC DOMAIN| 00000970: 20 50 52 4F 47 52 41 4D 20 45 58 49 53 54 20 4E | PROGRAM EXIST N| 00000980: 41 4D 45 44 20 22 31 35 37 31 2E 44 49 41 47 22 |AMED "1571.DIAG"| 00000990: 20 57 48 49 43 48 20 57 49 4C 4C 20 43 48 45 43 | WHICH WILL CHEC| 000009A0: 4B 20 59 4F 55 52 20 44 52 49 56 45 20 54 4F 20 |K YOUR DRIVE TO | 000009B0: 45 53 54 41 42 4C 49 53 48 20 57 48 49 43 48 20 |ESTABLISH WHICH | 000009C0: 54 59 50 45 20 4F 46 20 D2 CF CD 20 49 54 20 43 |TYPE OF ... IT C| 000009D0: 4F 4E 54 41 49 4E 53 2E 0D 0D 31 35 38 31 20 C4 |ONTAINS...1581 .| 000009E0: C9 D3 CB 20 C4 D2 C9 D6 C5 3A 0D D4 48 52 45 45 |... .....:..HREE| 000009F0: 20 46 41 55 4C 54 53 20 41 52 45 20 4B 4E 4F 57 | FAULTS ARE KNOW| 00000A00: 4E 20 54 4F 20 54 48 45 20 41 55 54 48 4F 52 3A |N TO THE AUTHOR:| 00000A10: 0D 31 29 20 20 C1 54 20 52 41 52 45 20 4F 43 43 |.1) .T RARE OCC| 00000A20: 41 53 49 4F 4E 53 2C 20 41 20 44 49 53 4B 20 4D |ASIONS, A DISK M| 00000A30: 41 59 20 42 45 43 4F 4D 45 20 53 45 56 45 52 45 |AY BECOME SEVERE| 00000A40: 4C 59 20 43 4F 52 52 55 50 54 45 44 2E 20 20 D4 |LY CORRUPTED. .| 00000A50: 48 49 53 20 49 53 20 44 55 45 20 54 4F 20 54 48 |HIS IS DUE TO TH| 00000A60: 45 20 D7 C4 31 37 37 30 2D 30 30 20 44 49 53 4B |E ..1770-00 DISK| 00000A70: 20 43 4F 4E 54 52 4F 4C 4C 45 52 20 43 48 49 50 | CONTROLLER CHIP| 00000A80: 20 55 53 45 44 20 49 4E 20 54 48 45 20 4F 52 49 | USED IN THE ORI| 00000A90: 47 49 4E 41 4C 20 31 35 38 31 27 53 2E 20 20 D4 |GINAL 1581'S. .| 00000AA0: 48 49 53 20 43 4F 4E 54 52 4F 4C 4C 45 52 20 57 |HIS CONTROLLER W| 00000AB0: 41 53 20 4C 41 54 45 52 20 52 45 50 4C 41 43 45 |AS LATER REPLACE| 00000AC0: 44 20 42 59 20 41 20 D7 C4 31 37 37 32 2D 30 30 |D BY A ..1772-00| 00000AD0: 20 43 48 49 50 20 57 48 49 43 48 20 53 4F 4C 56 | CHIP WHICH SOLV| 00000AE0: 45 44 20 54 48 41 54 20 50 52 4F 42 4C 45 4D 2E |ED THAT PROBLEM.| 00000AF0: 20 20 C9 54 20 49 53 20 4E 4F 54 20 45 41 53 59 | .T IS NOT EASY| 00000B00: 20 54 4F 20 52 45 50 4C 41 43 45 20 54 48 45 20 | TO REPLACE THE | 00000B10: 43 48 49 50 20 49 46 20 59 4F 55 20 48 41 56 45 |CHIP IF YOU HAVE| 00000B20: 20 54 48 45 20 22 57 52 4F 4E 47 22 20 4F 4E 45 | THE "WRONG" ONE| 00000B30: 2C 20 42 45 43 41 55 53 45 20 49 54 20 49 53 20 |, BECAUSE IT IS | 00000B40: 53 4F 4C 44 45 52 45 44 20 49 4E 20 50 4C 41 43 |SOLDERED IN PLAC| 00000B50: 45 2E 20 20 C9 46 20 59 4F 55 20 43 48 41 4E 47 |E. .F YOU CHANG| 00000B60: 45 20 43 48 49 50 53 2C 20 59 4F 55 20 4D 41 59 |E CHIPS, YOU MAY| 00000B70: 20 41 4C 53 4F 20 53 48 4F 52 54 20 4A 55 4D 50 | ALSO SHORT JUMP| 00000B80: 45 52 20 CA 31 20 57 49 54 48 20 41 20 34 37 20 |ER .1 WITH A 47 | 00000B90: 4F 48 4D 20 52 45 53 49 53 54 4F 52 2E 20 20 C1 |OHM RESISTOR. .| 00000BA0: 4C 54 48 4F 55 47 48 20 54 48 49 53 20 49 53 20 |LTHOUGH THIS IS | 00000BB0: 4E 4F 54 20 45 53 53 45 4E 54 49 41 4C 2C 20 49 |NOT ESSENTIAL, I| 00000BC0: 54 20 57 49 4C 4C 20 41 4C 4C 4F 57 20 54 48 45 |T WILL ALLOW THE| 00000BD0: 20 44 52 49 56 45 20 54 4F 20 55 53 45 20 54 48 | DRIVE TO USE TH| 00000BE0: 45 20 36 20 4D 53 20 53 54 45 50 20 52 41 54 45 |E 6 MS STEP RATE| 00000BF0: 2E 0D 32 29 20 20 D7 48 45 4E 20 43 52 45 41 54 |..2) .HEN CREAT| 00000C00: 49 4E 47 20 41 20 53 55 42 2D 53 55 42 20 44 49 |ING A SUB-SUB DI| 00000C10: 52 45 43 54 4F 52 59 20 28 4F 4E 45 20 53 55 42 |RECTORY (ONE SUB| 00000C20: 44 49 52 45 43 54 4F 52 59 20 49 4E 53 49 44 45 |DIRECTORY INSIDE| 00000C30: 20 41 4E 4F 54 48 45 52 20 53 55 42 44 49 52 45 | ANOTHER SUBDIRE| 00000C40: 43 54 4F 52 59 29 2C 20 54 48 45 20 50 41 52 45 |CTORY), THE PARE| 00000C50: 4E 54 20 44 49 52 45 43 54 4F 52 59 20 57 4F 55 |NT DIRECTORY WOU| 00000C60: 4C 44 20 53 4F 4D 45 54 49 4D 45 53 20 42 45 20 |LD SOMETIMES BE | 00000C70: 45 52 41 53 45 44 20 57 48 45 4E 20 54 48 45 20 |ERASED WHEN THE | 00000C80: 53 55 42 2D 53 55 42 20 44 49 52 45 43 54 4F 52 |SUB-SUB DIRECTOR| 00000C90: 59 20 57 41 53 20 53 55 50 50 4F 53 45 44 20 54 |Y WAS SUPPOSED T| 00000CA0: 4F 20 42 45 20 46 4F 52 4D 41 54 54 45 44 2E 20 |O BE FORMATTED. | 00000CB0: 20 C9 4E 20 54 48 45 20 44 45 53 49 47 4E 20 4F | .N THE DESIGN O| 00000CC0: 46 20 D4 C8 C5 20 D3 C5 D2 D6 C1 CE D4 2C 20 41 |F ... ......., A| 00000CD0: 4E 20 41 54 54 45 4D 50 54 20 48 41 53 20 42 45 |N ATTEMPT HAS BE| 00000CE0: 45 4E 20 4D 41 44 45 20 54 4F 20 50 41 54 43 48 |EN MADE TO PATCH| 00000CF0: 20 55 50 20 54 48 45 20 50 52 4F 42 4C 45 4D 2C | UP THE PROBLEM,| 00000D00: 20 42 55 54 20 C9 20 48 41 56 45 4E 27 54 20 42 | BUT . HAVEN'T B| 00000D10: 45 45 4E 20 41 42 4C 45 20 54 4F 20 56 45 52 49 |EEN ABLE TO VERI| 00000D20: 46 59 20 49 46 20 49 54 20 52 45 41 4C 4C 59 20 |FY IF IT REALLY | 00000D30: 46 49 58 45 53 20 54 48 45 20 50 52 4F 42 4C 45 |FIXES THE PROBLE| 00000D40: 4D 2E 20 20 D0 4C 45 41 53 45 20 52 45 50 4F 52 |M. .LEASE REPOR| 00000D50: 54 20 49 46 20 59 4F 55 20 52 55 4E 20 49 4E 54 |T IF YOU RUN INT| 00000D60: 4F 20 54 52 4F 55 42 4C 45 20 55 53 49 4E 47 20 |O TROUBLE USING | 00000D70: D4 C8 C5 20 D3 C5 D2 D6 C1 CE D4 27 53 20 50 41 |... .......'S PA| 00000D80: 52 54 49 54 49 4F 4E 20 43 52 45 41 54 4F 52 20 |RTITION CREATOR | 00000D90: 4D 41 4B 49 4E 47 20 53 55 42 2D 53 55 42 20 44 |MAKING SUB-SUB D| 00000DA0: 49 52 45 43 54 4F 52 49 45 53 2E 0D 33 29 20 20 |IRECTORIES..3) | 00000DB0: D3 4F 4D 45 20 31 35 38 31 53 20 48 41 53 20 41 |.OME 1581S HAS A| 00000DC0: 20 50 4F 4F 52 20 53 4F 4C 44 45 52 20 4A 4F 49 | POOR SOLDER JOI| 00000DD0: 4E 54 20 4F 4E 20 54 48 45 20 4D 4F 54 48 45 52 |NT ON THE MOTHER| 00000DE0: 42 4F 41 52 44 2E 20 20 D4 48 49 53 20 4A 4F 49 |BOARD. .HIS JOI| 00000DF0: 4E 54 20 49 53 20 4F 4E 20 50 49 4E 20 31 30 20 |NT IS ON PIN 10 | 00000E00: 4F 4E 20 44 45 56 49 43 45 20 D5 31 30 2E 20 20 |ON DEVICE .10. | 00000E10: C9 54 20 43 41 55 53 45 53 20 4F 43 43 41 53 49 |.T CAUSES OCCASI| 00000E20: 4F 4E 41 4C 20 22 44 45 56 49 43 45 20 4E 4F 54 |ONAL "DEVICE NOT| 00000E30: 20 50 52 45 53 45 4E 54 22 20 45 52 52 4F 52 53 | PRESENT" ERRORS| 00000E40: 2E 20 20 D4 C8 C5 20 D3 C5 D2 D6 C1 CE D4 20 4D |. ... ....... M| 00000E50: 41 59 20 47 49 56 45 20 55 50 20 41 4E 44 20 4D |AY GIVE UP AND M| 00000E60: 41 4B 45 20 41 20 42 45 4C 4C 20 54 4F 4E 45 20 |AKE A BELL TONE | 00000E70: 4F 4E 20 54 48 45 20 CD 41 49 4E 20 CD 45 4E 55 |ON THE .AIN .ENU| 00000E80: 20 4F 52 20 41 42 4F 52 54 49 4E 47 20 42 59 20 | OR ABORTING BY | 00000E90: 44 49 53 50 4C 41 59 49 4E 47 20 22 C9 2F CF 20 |DISPLAYING "./. | 00000EA0: 45 52 52 4F 52 22 20 49 4E 20 54 48 45 20 C4 49 |ERROR" IN THE .I| 00000EB0: 53 4B 20 D4 4F 4F 4C 53 20 53 45 43 54 49 4F 4E |SK .OOLS SECTION| 00000EC0: 2E 0D 0D C1 20 50 52 4F 47 52 41 4D 20 45 58 49 |.... PROGRAM EXI| 00000ED0: 53 54 53 20 49 4E 20 54 48 45 20 50 55 42 4C 49 |STS IN THE PUBLI| 00000EE0: 43 20 44 4F 4D 41 49 4E 20 43 41 4C 4C 45 44 20 |C DOMAIN CALLED | 00000EF0: 22 31 35 38 31 2E 44 49 41 47 22 2E 20 20 C9 54 |"1581.DIAG". .T| 00000F00: 20 57 49 4C 4C 20 49 44 45 4E 54 49 46 59 20 54 | WILL IDENTIFY T| 00000F10: 48 45 20 43 4F 4E 54 52 4F 4C 4C 45 52 20 43 48 |HE CONTROLLER CH| 00000F20: 49 50 20 41 4E 44 20 54 48 45 20 4A 55 4D 50 45 |IP AND THE JUMPE| 00000F30: 52 20 CA 31 2C 20 42 55 54 20 4E 4F 54 20 54 48 |R .1, BUT NOT TH| 00000F40: 45 20 50 4F 4F 52 20 53 4F 4C 44 45 52 20 4A 4F |E POOR SOLDER JO| 00000F50: 49 4E 54 2E 0D 0D 31 35 34 31 20 C6 CF D2 CD C1 |INT...1541 .....| 00000F60: D4 D4 C5 C4 20 C4 C9 D3 CB D3 3A 0D D3 4F 4D 45 |.... .....:..OME| 00000F70: 20 44 49 53 4B 53 20 46 4F 52 4D 41 54 54 45 44 | DISKS FORMATTED| 00000F80: 20 42 59 20 4F 4C 44 20 31 35 34 31 53 20 4F 52 | BY OLD 1541S OR| 00000F90: 20 43 4F 4D 50 41 54 49 42 4C 45 20 44 49 53 4B | COMPATIBLE DISK| 00000FA0: 20 44 52 49 56 45 53 20 53 45 45 4D 20 54 4F 20 | DRIVES SEEM TO | 00000FB0: 4D 41 4C 46 55 4E 43 54 49 4F 4E 20 57 48 45 4E |MALFUNCTION WHEN| 00000FC0: 20 52 45 41 44 20 55 53 49 4E 47 20 41 20 31 35 | READ USING A 15| 00000FD0: 37 31 20 49 4E 20 31 35 37 31 20 4D 4F 44 45 2E |71 IN 1571 MODE.| 00000FE0: 20 20 D4 48 45 20 44 49 53 4B 20 53 45 45 4D 53 | .HE DISK SEEMS| 00000FF0: 20 54 4F 20 53 50 49 4E 20 46 4F 52 45 56 45 52 | TO SPIN FOREVER| 00001000: 2E 20 20 D4 48 49 53 20 41 4C 53 4F 20 48 41 50 |. .HIS ALSO HAP| 00001010: 50 45 4E 53 20 57 49 54 48 20 53 4F 4D 45 20 4F |PENS WITH SOME O| 00001020: 4C 44 45 52 20 C3 36 34 20 43 4F 4D 4D 45 52 43 |LDER .64 COMMERC| 00001030: 49 41 4C 20 50 52 4F 47 52 41 4D 53 2E 20 20 D4 |IAL PROGRAMS. .| 00001040: 48 45 20 44 52 49 56 45 20 57 49 4C 4C 20 52 45 |HE DRIVE WILL RE| 00001050: 43 4F 47 4E 49 5A 45 20 54 48 45 20 44 49 53 4B |COGNIZE THE DISK| 00001060: 20 49 46 20 49 54 53 20 4C 45 46 54 20 41 4C 4F | IF ITS LEFT ALO| 00001070: 4E 45 20 46 4F 52 20 41 20 57 48 49 4C 45 20 54 |NE FOR A WHILE T| 00001080: 48 4F 55 47 48 2C 20 41 4E 44 20 54 48 45 20 44 |HOUGH, AND THE D| 00001090: 45 4C 41 59 20 4D 41 59 20 52 45 50 45 41 54 20 |ELAY MAY REPEAT | 000010A0: 45 56 45 52 59 20 54 49 4D 45 20 54 48 45 20 44 |EVERY TIME THE D| 000010B0: 49 53 4B 20 49 53 20 52 45 41 44 2E 20 20 D4 48 |ISK IS READ. .H| 000010C0: 45 20 44 45 4C 41 59 20 43 41 4E 20 42 45 20 45 |E DELAY CAN BE E| 000010D0: 4C 49 4D 49 4E 41 54 45 44 20 42 59 20 53 57 49 |LIMINATED BY SWI| 000010E0: 54 43 48 49 4E 47 20 59 4F 55 52 20 31 35 37 31 |TCHING YOUR 1571| 000010F0: 20 54 4F 20 31 35 34 31 20 4D 4F 44 45 2E 0D 0D | TO 1541 MODE...| 00001100: C6 52 4F 4D 20 D6 34 2E 38 34 20 41 4E 44 20 55 |.ROM .4.84 AND U| 00001110: 50 2C 20 C3 41 4C 4C 20 C5 58 52 4F 4D 20 57 49 |P, .ALL .XROM WI| 00001120: 4C 4C 20 57 4F 52 4B 20 57 49 54 48 20 54 48 45 |LL WORK WITH THE| 00001130: 20 D2 CF CD 20 43 48 49 50 20 43 41 4C 4C 45 44 | ... CHIP CALLED| 00001140: 20 CB 45 59 C4 4F 53 2E 20 20 D4 48 49 53 20 44 | .EY.OS. .HIS D| 00001150: 49 44 4E 27 54 20 57 4F 52 4B 20 42 45 46 4F 52 |IDN'T WORK BEFOR| 00001160: 45 20 44 55 45 20 54 4F 20 54 48 45 20 49 4E 46 |E DUE TO THE INF| 00001170: 45 52 49 4F 52 20 4D 45 54 48 4F 44 20 55 53 45 |ERIOR METHOD USE| 00001180: 44 20 42 59 20 CB C4 20 54 4F 20 53 45 4E 53 45 |D BY .. TO SENSE| 00001190: 20 49 4E 20 57 48 49 43 48 20 4D 45 4D 4F 52 59 | IN WHICH MEMORY| 000011A0: 20 42 41 4E 4B 20 49 54 20 49 53 20 4C 4F 43 41 | BANK IT IS LOCA| 000011B0: 54 45 44 2E 20 20 CE 4F 54 20 41 20 D4 D3 20 42 |TED. .OT A .. B| 000011C0: 55 47 2C 20 42 55 54 20 41 20 57 4F 52 4B 41 52 |UG, BUT A WORKAR| 000011D0: 4F 55 4E 44 20 48 41 53 20 42 45 45 4E 20 45 4D |OUND HAS BEEN EM| 000011E0: 50 4C 4F 59 45 44 20 57 48 49 43 48 20 57 49 4C |PLOYED WHICH WIL| 000011F0: 4C 20 45 4E 53 55 52 45 20 43 4F 4D 50 41 54 49 |L ENSURE COMPATI| 00001200: 42 49 4C 49 54 59 2E 20 20 C8 4F 57 45 56 45 52 |BILITY. .OWEVER| 00001210: 2C 20 54 48 45 20 D3 D9 D3 20 41 44 44 52 45 53 |, THE ... ADDRES| 00001220: 53 20 50 52 4F 56 49 44 45 44 20 42 59 20 CB C4 |S PROVIDED BY ..| 00001230: 20 41 54 20 50 4F 57 45 52 2D 55 50 20 54 4F 20 | AT POWER-UP TO | 00001240: 49 4E 56 4F 4B 45 20 49 54 20 57 49 4C 4C 20 4E |INVOKE IT WILL N| 00001250: 4F 54 20 57 4F 52 4B 2E 20 20 D4 48 49 53 20 49 |OT WORK. .HIS I| 00001260: 53 20 4E 4F 54 20 41 20 42 49 47 20 50 52 4F 42 |S NOT A BIG PROB| 00001270: 4C 45 4D 2C 20 42 45 43 41 55 53 45 20 59 4F 55 |LEM, BECAUSE YOU| 00001280: 20 43 41 4E 20 55 53 45 20 C3 41 4C 4C 20 C5 58 | CAN USE .ALL .X| 00001290: 52 4F 4D 20 57 48 49 4C 45 20 48 4F 4C 44 49 4E |ROM WHILE HOLDIN| 000012A0: 47 20 44 4F 57 4E 20 C1 CC D4 2C 20 41 4E 44 20 |G DOWN ..., AND | 000012B0: CB C4 20 57 49 4C 4C 20 49 4E 53 54 41 4C 4C 20 |.. WILL INSTALL | 000012C0: 47 52 41 43 45 46 55 4C 4C 59 2E 0D 0D D4 48 45 |GRACEFULLY....HE| 000012D0: 20 D2 C1 CD 4C 49 4E 4B 20 28 41 4E 44 20 50 52 | ...LINK (AND PR| 000012E0: 4F 42 41 42 4C 59 20 D2 C1 CD 44 52 49 56 45 29 |OBABLY ...DRIVE)| 000012F0: 20 46 52 4F 4D 20 C3 52 45 41 54 49 56 45 20 CD | FROM .REATIVE .| 00001300: 49 43 52 4F 20 C4 45 53 49 47 4E 53 20 44 4F 4E |ICRO .ESIGNS DON| 00001310: 27 54 20 57 4F 52 4B 20 57 45 4C 4C 20 54 4F 47 |'T WORK WELL TOG| 00001320: 45 54 48 45 52 20 57 49 54 48 20 D4 C8 C5 20 D3 |ETHER WITH ... .| 00001330: C5 D2 D6 C1 CE D4 20 4E 4F 52 20 41 4E 59 20 4F |...... NOR ANY O| 00001340: 54 48 45 52 20 46 55 4E 43 54 49 4F 4E 20 D2 CF |THER FUNCTION ..| 00001350: CD 20 43 48 49 50 2E 20 20 D4 48 49 53 20 49 53 |. CHIP. .HIS IS| 00001360: 20 41 20 50 52 4F 42 4C 45 4D 20 49 4E 48 45 52 | A PROBLEM INHER| 00001370: 45 4E 54 20 54 4F 20 54 48 45 20 D2 C1 CD 4C 49 |ENT TO THE ...LI| 00001380: 4E 4B 20 48 41 52 44 57 41 52 45 2E 20 20 C8 4F |NK HARDWARE. .O| 00001390: 57 45 56 45 52 2C 20 D4 C8 C5 20 D3 C5 D2 D6 C1 |WEVER, ... .....| 000013A0: CE D4 20 57 49 4C 4C 20 57 4F 52 4B 20 53 4D 4F |.. WILL WORK SMO| 000013B0: 4F 54 48 4C 59 20 49 46 20 D2 C1 CD 4C 49 4E 4B |OTHLY IF ...LINK| 000013C0: 20 49 53 20 53 57 49 54 43 48 45 44 20 4F 46 46 | IS SWITCHED OFF| 000013D0: 2E 0D |.. |
APPENDIX D: HARDWARE PROBLEMS..COMMODOR E COMPUTER SYSTEMS HAVE ALWAYS HAD BUGS AND QUIRKS OF VARYING SEVERITY. SOME OF THE QUIRKS MAY AFFECT THE OPERATION WHE N THE SERVANT IS IN CHARGE OF OPERATIONS . SEVERAL KNOWN BUGS HAS BEEN CIRCUMVEN TED IN THE DESIGN OF THE SERVANT, BUT TH EN THERE ARE SOME THAT CAN'T BE PATCHED OVER. BELOW YOU'LL FIND A LIST OF THE B UGS AND QUIRKS KNOWN BY THE AUTHOR THAT YOU MAY ENCOUNTER...ALL DISK DRIVES:.WHE N YOU ATTEMPT TO EXCEED THE NUMBER OF FI LES PERMITTED, ODD THINGS SOMETIMES HAPP ENS. THE PROBLEM IS WORST ON THE 1571 ( AND POSSIBLY THE 1541). SPACE IS ALLOCA TED FOR THE NEW FILE WHILE THERE IS NO R OOM FOR THE FILE NAME IN THE DIRECTORY. THE BUG WILL ESPECIALLY AFFECT THE FILE COPIER. IF YOU SEE THE ERROR MESSAGE " DISK FULL", YOU SHOULD VALIDATE THE DISK TO PUT THINGS RIGHT AGAIN. IT SHOULD B E NOTED THAT YOU WON'T ENCOUNTER THE DIS K FULL ERROR IF THE FILE COPIER RUNS OUT OF DISK SPACE (NOT EXCEEDING THE MAXIMU M NUMBER OF FILES). A SAFEGUARD SYSTEM PREVENTS THAT. SO FAR, I HAVE NOT FOUND A WAY TO CIRCUMVENT THE PROBLEMS THAT O CCUR WHEN YOU TRY TO SAVE TOO MANY FILES . SO FOR THE TIME BEING, VALIDATE THE D ISK AFTER A DISK FULL ERROR...1571 DISK DRIVE:.THE BUGS APPLY TO THE 128D PORTAB LE (128D WITH COOLING FAN & CARRYING HAN DLE), AND THE STAND-ALONE 1571. HOWEVER , UPGRADE ROM'S HAS BEEN RELEASED BY COM MODORE TO FIX ALL PROBLEMS. THE COMMODO RE PART NUMBER OF THIS ROM IS 310654-05. YOU CAN GET YOURSELF THE FIX ROM BY SE NDING AN 27256 EPROM ALONG WITH THE SAME TURNAROUND FEE AND SHIPPING CHARGE THAT APPLIES FOR SERVANT EPROMS. AN EVEN BE TTER ALTERNATIVE IS JIFFYDOS, WHICH FURT HER ENHANCES THE PERFORMANCE OF YOUR SYS TEM (PLEASE REFER TO APPENDIX F)...PROBL EMS THAT MAY OCCUR USING "OLD-ROM" 1571' S WITH THE SERVANT:.1) RANDOM "DEVICE N OT PRESENT" ERRORS. THE SERVANT MAY GIV E UP AND MAKE A BELL TONE ON THE MAIN ME NU OR ABORTING BY DISPLAYING "I/O ERROR" IN THE DISK TOOLS SECTION..2) SEQUENTI AL FILE CORRUPTION. WHEN A SEQUENTIAL F ILE USE BLOCKS ON BOTH SIDES OF THE DISK , IT WILL SOMETIMES GET CORRUPTED. AFFE CTS THE FILE COPIER..3) THE DRIVE CAN'T BURST LOAD "LOCKED" FILES. AFFECTS SEV ERAL SERVANT FEATURES. .4) SEVERAL BUG S AFFECTS THE SPEED OF OPERATIONS. THE DISK DRIVE GOES CLICK-CLICK-CLICK FOR A VERY LONG TIME TRYING TO RECOGNIZE SOME DISKS, AND THE DRIVE IS VERY SLOW AT WRI TING DATA TO THE BACK SIDE OF THE DISK.. .A PUBLIC DOMAIN PROGRAM EXIST NAMED "15 71.DIAG" WHICH WILL CHECK YOUR DRIVE TO ESTABLISH WHICH TYPE OF ROM IT CONTAINS. ..1581 DISK DRIVE:.THREE FAULTS ARE KNOW N TO THE AUTHOR:.1) AT RARE OCCASIONS, A DISK MAY BECOME SEVERELY CORRUPTED. T HIS IS DUE TO THE WD1770-00 DISK CONTROL LER CHIP USED IN THE ORIGINAL 1581'S. T HIS CONTROLLER WAS LATER REPLACED BY A W D1772-00 CHIP WHICH SOLVED THAT PROBLEM. IT IS NOT EASY TO REPLACE THE CHIP IF YOU HAVE THE "WRONG" ONE, BECAUSE IT IS SOLDERED IN PLACE. IF YOU CHANGE CHIPS, YOU MAY ALSO SHORT JUMPER J1 WITH A 47 OHM RESISTOR. ALTHOUGH THIS IS NOT ESSE NTIAL, IT WILL ALLOW THE DRIVE TO USE TH E 6 MS STEP RATE..2) WHEN CREATING A SU B-SUB DIRECTORY (ONE SUBDIRECTORY INSIDE ANOTHER SUBDIRECTORY), THE PARENT DIREC TORY WOULD SOMETIMES BE ERASED WHEN THE SUB-SUB DIRECTORY WAS SUPPOSED TO BE FOR MATTED. IN THE DESIGN OF THE SERVANT, A N ATTEMPT HAS BEEN MADE TO PATCH UP THE PROBLEM, BUT I HAVEN'T BEEN ABLE TO VERI FY IF IT REALLY FIXES THE PROBLEM. PLEA SE REPORT IF YOU RUN INTO TROUBLE USING THE SERVANT'S PARTITION CREATOR MAKING S UB-SUB DIRECTORIES..3) SOME 1581S HAS A POOR SOLDER JOINT ON THE MOTHERBOARD. THIS JOINT IS ON PIN 10 ON DEVICE U10. IT CAUSES OCCASIONAL "DEVICE NOT PRESENT " ERRORS. THE SERVANT MAY GIVE UP AND M AKE A BELL TONE ON THE MAIN MENU OR ABOR TING BY DISPLAYING "I/O ERROR" IN THE DI SK TOOLS SECTION...A PROGRAM EXISTS IN T HE PUBLIC DOMAIN CALLED "1581.DIAG". IT WILL IDENTIFY THE CONTROLLER CHIP AND T HE JUMPER J1, BUT NOT THE POOR SOLDER JO INT...1541 FORMATTED DISKS:.SOME DISKS F ORMATTED BY OLD 1541S OR COMPATIBLE DISK DRIVES SEEM TO MALFUNCTION WHEN READ US ING A 1571 IN 1571 MODE. THE DISK SEEMS TO SPIN FOREVER. THIS ALSO HAPPENS WIT H SOME OLDER C64 COMMERCIAL PROGRAMS. T HE DRIVE WILL RECOGNIZE THE DISK IF ITS LEFT ALONE FOR A WHILE THOUGH, AND THE D ELAY MAY REPEAT EVERY TIME THE DISK IS R EAD. THE DELAY CAN BE ELIMINATED BY SWI TCHING YOUR 1571 TO 1541 MODE...FROM V4. 84 AND UP, CALL EXROM WILL WORK WITH THE ROM CHIP CALLED KEYDOS. THIS DIDN'T WO RK BEFORE DUE TO THE INFERIOR METHOD USE D BY KD TO SENSE IN WHICH MEMORY BANK IT IS LOCATED. NOT A TS BUG, BUT A WORKAR OUND HAS BEEN EMPLOYED WHICH WILL ENSURE COMPATIBILITY. HOWEVER, THE SYS ADDRES S PROVIDED BY KD AT POWER-UP TO INVOKE I T WILL NOT WORK. THIS IS NOT A BIG PROB LEM, BECAUSE YOU CAN USE CALL EXROM WHIL E HOLDING DOWN ALT, AND KD WILL INSTALL GRACEFULLY...THE RAMLINK (AND PROBABLY R AMDRIVE) FROM CREATIVE MICRO DESIGNS DON 'T WORK WELL TOGETHER WITH THE SERVANT N OR ANY OTHER FUNCTION ROM CHIP. THIS IS A PROBLEM INHERENT TO THE RAMLINK HARDW ARE. HOWEVER, THE SERVANT WILL WORK SMO OTHLY IF RAMLINK IS SWITCHED OFF..
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